sedimentary
Red Jasper
Silica (Silicon Dioxide), Formula: SiO2 with Iron impurities
Hardness: 6.5 to 7 on Mohs scale; Color: Red, often with creamy or white banding; Luster: Vitreous to waxy; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture)
- Hardness
- 6
- Color
- Red, often with creamy or white banding
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5 to 7 on Mohs scale; Color: Red, often with creamy or white banding; Luster: Vitreous to waxy; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture)
Formation & geological history
Forms through the infiltration of silica in sedimentary environments or volcanic ash, often during the Precambrian or Paleozoic eras. Its red color is derived from iron inclusions during the crystallization process.
Uses & applications
Used extensively in jewelry as cabochons, beads, and carvings. Also used as an ornamental stone and for metaphysical collecting.
Geological facts
Red Jasper was known as the 'stone of endurance' in ancient times. It has been used for thousands of years in protective amulets by various cultures including the Egyptians and Native Americans.
Field identification & locations
Identify by its deep red color, hardness (it will scratch glass but not conversely), and smooth, waxy feel when tumbled. Common in river beds and desert environments globally.
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